/****************************************************************************** * * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ /*! ************************************************************************** * \file ih264d_parse_headers.c * * \brief * Contains High level syntax[above slice] parsing routines * * \date * 19/12/2002 * * \author AI ************************************************************************** */ #include "ih264_typedefs.h" #include "ih264_macros.h" #include "ih264_platform_macros.h" #include "ih264d_bitstrm.h" #include "ih264d_structs.h" #include "ih264d_parse_cavlc.h" #include "ih264d_defs.h" #include "ih264d_defs.h" #include "ih264d_defs.h" #include "ih264d_parse_slice.h" #include "ih264d_tables.h" #include "ih264d_utils.h" #include "ih264d_nal.h" #include "ih264d_deblocking.h" #include "ih264d_mem_request.h" #include "ih264d_debug.h" #include "ih264d_error_handler.h" #include "ih264d_mb_utils.h" #include "ih264d_sei.h" #include "ih264d_vui.h" #include "ih264d_thread_parse_decode.h" #include "ih264d_thread_compute_bs.h" #include "ih264d_quant_scaling.h" #include "ih264d_defs.h" #include "ivd.h" #include "ih264d.h" /*****************************************************************************/ /* */ /* Function Name : ih264d_parse_slice_partition */ /* */ /* Description : This function is intended to parse and decode slice part */ /* itions. Currently it's not implemented. Decoder will */ /* print a message, skips this NAL and continues */ /* Inputs : ps_dec Decoder parameters */ /* ps_bitstrm Bitstream */ /* Globals : None */ /* Processing : This functionality needs to be implemented */ /* Outputs : None */ /* Returns : None */ /* */ /* Issues : Not implemented */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 06 05 2002 NS Draft */ /* */ /*****************************************************************************/ WORD32 ih264d_parse_slice_partition(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) { H264_DEC_DEBUG_PRINT("\nSlice partition not supported"); UNUSED(ps_dec); UNUSED(ps_bitstrm); return (0); } /*****************************************************************************/ /* */ /* Function Name : ih264d_parse_sei */ /* */ /* Description : This function is intended to parse and decode SEI */ /* Currently it's not implemented. Decoder will print a */ /* message, skips this NAL and continues */ /* Inputs : ps_dec Decoder parameters */ /* ps_bitstrm Bitstream */ /* Globals : None */ /* Processing : This functionality needs to be implemented */ /* Outputs : None */ /* Returns : None */ /* */ /* Issues : Not implemented */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 06 05 2002 NS Draft */ /* */ /*****************************************************************************/ WORD32 ih264d_parse_sei(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) { UNUSED(ps_dec); UNUSED(ps_bitstrm); return (0); } /*****************************************************************************/ /* */ /* Function Name : ih264d_parse_filler_data */ /* */ /* Description : This function is intended to parse and decode filler */ /* data NAL. Currently it's not implemented. Decoder will */ /* print a message, skips this NAL and continues */ /* Inputs : ps_dec Decoder parameters */ /* ps_bitstrm Bitstream */ /* Globals : None */ /* Processing : This functionality needs to be implemented */ /* Outputs : None */ /* Returns : None */ /* */ /* Issues : Not implemented */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 06 05 2002 NS Draft */ /* */ /*****************************************************************************/ WORD32 ih264d_parse_filler_data(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) { UNUSED(ps_dec); UNUSED(ps_bitstrm); return (0); } /*****************************************************************************/ /* */ /* Function Name : ih264d_parse_end_of_stream */ /* */ /* Description : This function is intended to parse and decode end of */ /* sequence. Currently it's not implemented. Decoder will */ /* print a message, skips this NAL and continues */ /* Inputs : ps_dec Decoder parameters */ /* Globals : None */ /* Processing : This functionality needs to be implemented */ /* Outputs : None */ /* Returns : None */ /* */ /* Issues : Not implemented */ /* */ /* Revision History: */ /* */ /* DD MM YYYY Author(s) Changes (Describe the changes made) */ /* 06 05 2002 NS Draft */ /* */ /*****************************************************************************/ void ih264d_parse_end_of_stream(dec_struct_t * ps_dec) { UNUSED(ps_dec); return; } /*! ************************************************************************** * \if Function name : ih264d_parse_pps \endif * * \brief * Decodes Picture Parameter set * * \return * 0 on Success and Error code otherwise ************************************************************************** */ WORD32 ih264d_parse_pps(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm) { UWORD8 uc_temp; dec_seq_params_t * ps_sps = NULL; dec_pic_params_t * ps_pps = NULL; UWORD32 *pu4_bitstrm_buf = ps_dec->ps_bitstrm->pu4_buffer; UWORD32 *pu4_bitstrm_ofst = &ps_dec->ps_bitstrm->u4_ofst; /* Variables used for error resilience checks */ UWORD32 u4_temp; WORD32 i_temp; /* For High profile related syntax elements */ UWORD8 u1_more_data_flag; WORD32 i4_i; /*--------------------------------------------------------------------*/ /* Decode pic_parameter_set_id and find corresponding pic params */ /*--------------------------------------------------------------------*/ u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp & MASK_ERR_PIC_SET_ID) return ERROR_INV_SPS_PPS_T; ps_pps = ps_dec->pv_scratch_sps_pps; *ps_pps = ps_dec->ps_pps[u4_temp]; ps_pps->u1_pic_parameter_set_id = (WORD8)u4_temp; COPYTHECONTEXT("PPS: pic_parameter_set_id",ps_pps->u1_pic_parameter_set_id); /************************************************/ /* initilization of High profile syntax element */ /************************************************/ ps_pps->i4_transform_8x8_mode_flag = 0; ps_pps->i4_pic_scaling_matrix_present_flag = 0; /*--------------------------------------------------------------------*/ /* Decode seq_parameter_set_id and map it to a seq_parameter_set */ /*--------------------------------------------------------------------*/ u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp & MASK_ERR_SEQ_SET_ID) return ERROR_INV_SPS_PPS_T; COPYTHECONTEXT("PPS: seq_parameter_set_id",u4_temp); ps_sps = &ps_dec->ps_sps[u4_temp]; ps_pps->ps_sps = ps_sps; /*--------------------------------------------------------------------*/ /* Decode entropy_coding_mode */ /*--------------------------------------------------------------------*/ ps_pps->u1_entropy_coding_mode = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("PPS: entropy_coding_mode_flag",ps_pps->u1_entropy_coding_mode); ps_pps->u1_pic_order_present_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("PPS: pic_order_present_flag",ps_pps->u1_pic_order_present_flag); /*--------------------------------------------------------------------*/ /* Decode num_slice_groups_minus1 */ /*--------------------------------------------------------------------*/ u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf) + 1; if(u4_temp != 1) { UWORD32 i4_error_code; i4_error_code = ERROR_FEATURE_UNAVAIL; return i4_error_code; } ps_pps->u1_num_slice_groups = u4_temp; COPYTHECONTEXT("PPS: num_slice_groups_minus1",ps_pps->u1_num_slice_groups -1); /*--------------------------------------------------------------------*/ /* Other parameter set values */ /*--------------------------------------------------------------------*/ u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > H264_MAX_REF_IDX) return ERROR_REF_IDX; ps_pps->u1_num_ref_idx_lx_active[0] = u4_temp; COPYTHECONTEXT("PPS: num_ref_idx_l0_active_minus1", ps_pps->u1_num_ref_idx_lx_active[0] - 1); u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > H264_MAX_REF_IDX) return ERROR_REF_IDX; ps_pps->u1_num_ref_idx_lx_active[1] = u4_temp; COPYTHECONTEXT("PPS: num_ref_idx_l1_active_minus1", ps_pps->u1_num_ref_idx_lx_active[1] - 1); ps_pps->u1_wted_pred_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("PPS: weighted prediction u4_flag",ps_pps->u1_wted_pred_flag); uc_temp = ih264d_get_bits_h264(ps_bitstrm, 2); COPYTHECONTEXT("PPS: weighted_bipred_idc",uc_temp); ps_pps->u1_wted_bipred_idc = uc_temp; if(ps_pps->u1_wted_bipred_idc > MAX_WEIGHT_BIPRED_IDC) return ERROR_INV_SPS_PPS_T; i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if((i_temp < 0) || (i_temp > 51)) return ERROR_INV_RANGE_QP_T; ps_pps->u1_pic_init_qp = i_temp; COPYTHECONTEXT("PPS: pic_init_qp_minus26",ps_pps->u1_pic_init_qp - 26); i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if((i_temp < 0) || (i_temp > 51)) return ERROR_INV_RANGE_QP_T; ps_pps->u1_pic_init_qs = i_temp; COPYTHECONTEXT("PPS: pic_init_qs_minus26",ps_pps->u1_pic_init_qs - 26); i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if((i_temp < -12) || (i_temp > 12)) return ERROR_INV_RANGE_QP_T; ps_pps->i1_chroma_qp_index_offset = i_temp; COPYTHECONTEXT("PPS: chroma_qp_index_offset",ps_pps->i1_chroma_qp_index_offset); /***************************************************************************/ /* initialize second_chroma_qp_index_offset to i1_chroma_qp_index_offset if */ /* second_chroma_qp_index_offset is not present in bit-ps_bitstrm */ /***************************************************************************/ ps_pps->i1_second_chroma_qp_index_offset = ps_pps->i1_chroma_qp_index_offset; ps_pps->u1_deblocking_filter_parameters_present_flag = ih264d_get_bit_h264( ps_bitstrm); COPYTHECONTEXT("PPS: deblocking_filter_control_present_flag", ps_pps->u1_deblocking_filter_parameters_present_flag); ps_pps->u1_constrained_intra_pred_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("PPS: constrained_intra_pred_flag", ps_pps->u1_constrained_intra_pred_flag); ps_pps->u1_redundant_pic_cnt_present_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("PPS: redundant_pic_cnt_present_flag", ps_pps->u1_redundant_pic_cnt_present_flag); /* High profile related syntax elements */ u1_more_data_flag = MORE_RBSP_DATA(ps_bitstrm); if(u1_more_data_flag && (ps_pps->ps_sps->u1_profile_idc == HIGH_PROFILE_IDC)) { /* read transform_8x8_mode_flag */ ps_pps->i4_transform_8x8_mode_flag = (WORD32)ih264d_get_bit_h264( ps_bitstrm); /* read pic_scaling_matrix_present_flag */ ps_pps->i4_pic_scaling_matrix_present_flag = (WORD32)ih264d_get_bit_h264(ps_bitstrm); if(ps_pps->i4_pic_scaling_matrix_present_flag) { /* read the scaling matrices */ for(i4_i = 0; i4_i < (6 + (ps_pps->i4_transform_8x8_mode_flag << 1)); i4_i++) { ps_pps->u1_pic_scaling_list_present_flag[i4_i] = ih264d_get_bit_h264(ps_bitstrm); if(ps_pps->u1_pic_scaling_list_present_flag[i4_i]) { if(i4_i < 6) { ih264d_scaling_list( ps_pps->i2_pic_scalinglist4x4[i4_i], 16, &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i], ps_bitstrm); } else { ih264d_scaling_list( ps_pps->i2_pic_scalinglist8x8[i4_i - 6], 64, &ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i], ps_bitstrm); } } } } /* read second_chroma_qp_index_offset syntax element */ ps_pps->i1_second_chroma_qp_index_offset = ih264d_sev( pu4_bitstrm_ofst, pu4_bitstrm_buf); if((ps_pps->i1_second_chroma_qp_index_offset + 12) > 24) return ERROR_INV_RANGE_QP_T; } /* In case bitstream read has exceeded the filled size, then return an error */ if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst + 8) { return ERROR_INV_SPS_PPS_T; } ps_pps->u1_is_valid = TRUE; ps_dec->ps_pps[ps_pps->u1_pic_parameter_set_id] = *ps_pps; return OK; } /*! ************************************************************************** * \if Function name : ih264d_parse_sps \endif * * \brief * Decodes Sequence parameter set from the bitstream * * \return * 0 on Success and Error code otherwise ************************************************************************** */ UWORD32 ih264d_correct_level_idc(UWORD32 u4_level_idc, UWORD32 u4_total_mbs) { UWORD32 u4_max_mbs_allowed; switch(u4_level_idc) { case H264_LEVEL_1_0: u4_max_mbs_allowed = MAX_MBS_LEVEL_10; break; case H264_LEVEL_1_1: u4_max_mbs_allowed = MAX_MBS_LEVEL_11; break; case H264_LEVEL_1_2: u4_max_mbs_allowed = MAX_MBS_LEVEL_12; break; case H264_LEVEL_1_3: u4_max_mbs_allowed = MAX_MBS_LEVEL_13; break; case H264_LEVEL_2_0: u4_max_mbs_allowed = MAX_MBS_LEVEL_20; break; case H264_LEVEL_2_1: u4_max_mbs_allowed = MAX_MBS_LEVEL_21; break; case H264_LEVEL_2_2: u4_max_mbs_allowed = MAX_MBS_LEVEL_22; break; case H264_LEVEL_3_0: u4_max_mbs_allowed = MAX_MBS_LEVEL_30; break; case H264_LEVEL_3_1: u4_max_mbs_allowed = MAX_MBS_LEVEL_31; break; case H264_LEVEL_3_2: u4_max_mbs_allowed = MAX_MBS_LEVEL_32; break; case H264_LEVEL_4_0: u4_max_mbs_allowed = MAX_MBS_LEVEL_40; break; case H264_LEVEL_4_1: u4_max_mbs_allowed = MAX_MBS_LEVEL_41; break; case H264_LEVEL_4_2: u4_max_mbs_allowed = MAX_MBS_LEVEL_42; break; case H264_LEVEL_5_0: u4_max_mbs_allowed = MAX_MBS_LEVEL_50; break; case H264_LEVEL_5_1: default: u4_max_mbs_allowed = MAX_MBS_LEVEL_51; break; } /*correct of the level is incorrect*/ if(u4_total_mbs > u4_max_mbs_allowed) { if(u4_total_mbs > MAX_MBS_LEVEL_50) u4_level_idc = H264_LEVEL_5_1; else if(u4_total_mbs > MAX_MBS_LEVEL_42) u4_level_idc = H264_LEVEL_5_0; else if(u4_total_mbs > MAX_MBS_LEVEL_41) u4_level_idc = H264_LEVEL_4_2; else if(u4_total_mbs > MAX_MBS_LEVEL_40) u4_level_idc = H264_LEVEL_4_1; else if(u4_total_mbs > MAX_MBS_LEVEL_32) u4_level_idc = H264_LEVEL_4_0; else if(u4_total_mbs > MAX_MBS_LEVEL_31) u4_level_idc = H264_LEVEL_3_2; else if(u4_total_mbs > MAX_MBS_LEVEL_30) u4_level_idc = H264_LEVEL_3_1; else if(u4_total_mbs > MAX_MBS_LEVEL_21) u4_level_idc = H264_LEVEL_3_0; else if(u4_total_mbs > MAX_MBS_LEVEL_20) u4_level_idc = H264_LEVEL_2_1; else if(u4_total_mbs > MAX_MBS_LEVEL_10) u4_level_idc = H264_LEVEL_2_0; } return (u4_level_idc); } WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm) { UWORD8 i; dec_seq_params_t *ps_seq = NULL; UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id; UWORD16 i2_max_frm_num; UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer; UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst; UWORD8 u1_frm, uc_constraint_set0_flag, uc_constraint_set1_flag; UWORD32 u4_temp; WORD32 pic_height_in_map_units_minus1 = 0; UWORD32 u2_pic_wd = 0; UWORD32 u2_pic_ht = 0; UWORD32 u2_frm_wd_y = 0; UWORD32 u2_frm_ht_y = 0; UWORD32 u2_frm_wd_uv = 0; UWORD32 u2_frm_ht_uv = 0; UWORD32 u2_crop_offset_y = 0; UWORD32 u2_crop_offset_uv = 0; WORD32 ret; UWORD32 u4_num_reorder_frames; /* High profile related syntax element */ WORD32 i4_i; /* G050 */ UWORD8 u1_frame_cropping_flag, u1_frame_cropping_rect_left_ofst, u1_frame_cropping_rect_right_ofst, u1_frame_cropping_rect_top_ofst, u1_frame_cropping_rect_bottom_ofst; /* G050 */ /*--------------------------------------------------------------------*/ /* Decode seq_parameter_set_id and profile and level values */ /*--------------------------------------------------------------------*/ SWITCHONTRACE; u1_profile_idc = ih264d_get_bits_h264(ps_bitstrm, 8); COPYTHECONTEXT("SPS: profile_idc",u1_profile_idc); /* G050 */ uc_constraint_set0_flag = ih264d_get_bit_h264(ps_bitstrm); uc_constraint_set1_flag = ih264d_get_bit_h264(ps_bitstrm); ih264d_get_bit_h264(ps_bitstrm); /*****************************************************/ /* Read 5 bits for uc_constraint_set3_flag (1 bit) */ /* and reserved_zero_4bits (4 bits) - Sushant */ /*****************************************************/ ih264d_get_bits_h264(ps_bitstrm, 5); /* G050 */ /* Check whether particular profile is suported or not */ /* Check whether particular profile is suported or not */ if((u1_profile_idc != MAIN_PROFILE_IDC) && (u1_profile_idc != BASE_PROFILE_IDC) && (u1_profile_idc != HIGH_PROFILE_IDC) ) { if((uc_constraint_set1_flag != 1) && (uc_constraint_set0_flag != 1)) { if(NULL != ps_dec) { UWORD32 i4_error_code; i4_error_code = ERROR_FEATURE_UNAVAIL; return i4_error_code; } else { return (ERROR_FEATURE_UNAVAIL); } } } u1_level_idc = ih264d_get_bits_h264(ps_bitstrm, 8); COPYTHECONTEXT("SPS: u4_level_idc",u1_level_idc); u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp & MASK_ERR_SEQ_SET_ID) return ERROR_INV_SPS_PPS_T; u1_seq_parameter_set_id = u4_temp; COPYTHECONTEXT("SPS: seq_parameter_set_id", u1_seq_parameter_set_id); /*--------------------------------------------------------------------*/ /* Find an seq param entry in seqparam array of decStruct */ /*--------------------------------------------------------------------*/ ps_seq = ps_dec->pv_scratch_sps_pps; *ps_seq = ps_dec->ps_sps[u1_seq_parameter_set_id]; if(NULL == ps_dec->ps_cur_sps) ps_dec->ps_cur_sps = ps_seq; if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_profile_idc != u1_profile_idc)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_level_idc != u1_level_idc)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } ps_seq->u1_profile_idc = u1_profile_idc; ps_seq->u1_level_idc = u1_level_idc; ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id; /*******************************************************************/ /* Initializations for high profile - Sushant */ /*******************************************************************/ ps_seq->i4_chroma_format_idc = 1; ps_seq->i4_bit_depth_luma_minus8 = 0; ps_seq->i4_bit_depth_chroma_minus8 = 0; ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 0; ps_seq->i4_seq_scaling_matrix_present_flag = 0; if(u1_profile_idc == HIGH_PROFILE_IDC) { /* reading chroma_format_idc */ ps_seq->i4_chroma_format_idc = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); /* Monochrome is not supported */ if(ps_seq->i4_chroma_format_idc != 1) { return ERROR_INV_SPS_PPS_T; } /* reading bit_depth_luma_minus8 */ ps_seq->i4_bit_depth_luma_minus8 = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(ps_seq->i4_bit_depth_luma_minus8 != 0) { return ERROR_INV_SPS_PPS_T; } /* reading bit_depth_chroma_minus8 */ ps_seq->i4_bit_depth_chroma_minus8 = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(ps_seq->i4_bit_depth_chroma_minus8 != 0) { return ERROR_INV_SPS_PPS_T; } /* reading qpprime_y_zero_transform_bypass_flag */ ps_seq->i4_qpprime_y_zero_transform_bypass_flag = (WORD32)ih264d_get_bit_h264(ps_bitstrm); if(ps_seq->i4_qpprime_y_zero_transform_bypass_flag != 0) { return ERROR_INV_SPS_PPS_T; } /* reading seq_scaling_matrix_present_flag */ ps_seq->i4_seq_scaling_matrix_present_flag = (WORD32)ih264d_get_bit_h264(ps_bitstrm); if(ps_seq->i4_seq_scaling_matrix_present_flag) { for(i4_i = 0; i4_i < 8; i4_i++) { ps_seq->u1_seq_scaling_list_present_flag[i4_i] = ih264d_get_bit_h264(ps_bitstrm); /* initialize u1_use_default_scaling_matrix_flag[i4_i] to zero */ /* before calling scaling list */ ps_seq->u1_use_default_scaling_matrix_flag[i4_i] = 0; if(ps_seq->u1_seq_scaling_list_present_flag[i4_i]) { if(i4_i < 6) { ih264d_scaling_list( ps_seq->i2_scalinglist4x4[i4_i], 16, &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], ps_bitstrm); } else { ih264d_scaling_list( ps_seq->i2_scalinglist8x8[i4_i - 6], 64, &ps_seq->u1_use_default_scaling_matrix_flag[i4_i], ps_bitstrm); } } } } } /*--------------------------------------------------------------------*/ /* Decode MaxFrameNum */ /*--------------------------------------------------------------------*/ u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > MAX_BITS_IN_FRAME_NUM) { return ERROR_INV_SPS_PPS_T; } ps_seq->u1_bits_in_frm_num = u4_temp; COPYTHECONTEXT("SPS: log2_max_frame_num_minus4", (ps_seq->u1_bits_in_frm_num - 4)); i2_max_frm_num = (1 << (ps_seq->u1_bits_in_frm_num)); ps_seq->u2_u4_max_pic_num_minus1 = i2_max_frm_num - 1; /*--------------------------------------------------------------------*/ /* Decode picture order count and related values */ /*--------------------------------------------------------------------*/ u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > MAX_PIC_ORDER_CNT_TYPE) { return ERROR_INV_POC_TYPE_T; } ps_seq->u1_pic_order_cnt_type = u4_temp; COPYTHECONTEXT("SPS: pic_order_cnt_type",ps_seq->u1_pic_order_cnt_type); ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = 1; if(ps_seq->u1_pic_order_cnt_type == 0) { u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > MAX_BITS_IN_POC_LSB) { return ERROR_INV_SPS_PPS_T; } ps_seq->u1_log2_max_pic_order_cnt_lsb_minus = u4_temp; ps_seq->i4_max_pic_order_cntLsb = (1 << u4_temp); COPYTHECONTEXT("SPS: log2_max_pic_order_cnt_lsb_minus4",(u4_temp - 4)); } else if(ps_seq->u1_pic_order_cnt_type == 1) { ps_seq->u1_delta_pic_order_always_zero_flag = ih264d_get_bit_h264( ps_bitstrm); COPYTHECONTEXT("SPS: delta_pic_order_always_zero_flag", ps_seq->u1_delta_pic_order_always_zero_flag); ps_seq->i4_ofst_for_non_ref_pic = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: offset_for_non_ref_pic", ps_seq->i4_ofst_for_non_ref_pic); ps_seq->i4_ofst_for_top_to_bottom_field = ih264d_sev( pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: offset_for_top_to_bottom_field", ps_seq->i4_ofst_for_top_to_bottom_field); u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if(u4_temp > 255) return ERROR_INV_SPS_PPS_T; ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = u4_temp; COPYTHECONTEXT("SPS: num_ref_frames_in_pic_order_cnt_cycle", ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle); for(i = 0; i < ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle; i++) { ps_seq->i4_ofst_for_ref_frame[i] = ih264d_sev( pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: offset_for_ref_frame", ps_seq->i4_ofst_for_ref_frame[i]); } } u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); if((u4_temp > H264_MAX_REF_PICS)) { return ERROR_NUM_REF; } /* Compare with older num_ref_frames is header is already once */ if((3 == ps_dec->i4_header_decoded) && (ps_seq->u1_num_ref_frames != u4_temp)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } ps_seq->u1_num_ref_frames = u4_temp; COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames); ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264( ps_bitstrm); COPYTHECONTEXT("SPS: gaps_in_frame_num_value_allowed_flag", ps_seq->u1_gaps_in_frame_num_value_allowed_flag); /*--------------------------------------------------------------------*/ /* Decode FrameWidth and FrameHeight and related values */ /*--------------------------------------------------------------------*/ ps_seq->u2_frm_wd_in_mbs = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: pic_width_in_mbs_minus1", ps_seq->u2_frm_wd_in_mbs - 1); u2_pic_wd = (ps_seq->u2_frm_wd_in_mbs << 4); pic_height_in_map_units_minus1 = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); ps_seq->u2_frm_ht_in_mbs = 1 + pic_height_in_map_units_minus1; u2_pic_ht = (ps_seq->u2_frm_ht_in_mbs << 4); /*--------------------------------------------------------------------*/ /* Get the value of MaxMbAddress and Number of bits needed for it */ /*--------------------------------------------------------------------*/ ps_seq->u2_max_mb_addr = (ps_seq->u2_frm_wd_in_mbs * ps_seq->u2_frm_ht_in_mbs) - 1; ps_seq->u2_total_num_of_mbs = ps_seq->u2_max_mb_addr + 1; ps_seq->u1_level_idc = ih264d_correct_level_idc( u1_level_idc, ps_seq->u2_total_num_of_mbs); u1_frm = ih264d_get_bit_h264(ps_bitstrm); ps_seq->u1_frame_mbs_only_flag = u1_frm; COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm); if(!u1_frm) { u2_pic_ht <<= 1; ps_seq->u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag", ps_seq->u1_mb_aff_flag); } else ps_seq->u1_mb_aff_flag = 0; ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("SPS: direct_8x8_inference_flag", ps_seq->u1_direct_8x8_inference_flag); /* G050 */ u1_frame_cropping_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("SPS: frame_cropping_flag",u1_frame_cropping_flag); if(u1_frame_cropping_flag) { u1_frame_cropping_rect_left_ofst = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: frame_cropping_rect_left_offset", u1_frame_cropping_rect_left_ofst); u1_frame_cropping_rect_right_ofst = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: frame_cropping_rect_right_offset", u1_frame_cropping_rect_right_ofst); u1_frame_cropping_rect_top_ofst = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: frame_cropping_rect_top_offset", u1_frame_cropping_rect_top_ofst); u1_frame_cropping_rect_bottom_ofst = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf); COPYTHECONTEXT("SPS: frame_cropping_rect_bottom_offset", u1_frame_cropping_rect_bottom_ofst); } /* G050 */ ps_seq->u1_vui_parameters_present_flag = ih264d_get_bit_h264(ps_bitstrm); COPYTHECONTEXT("SPS: vui_parameters_present_flag", ps_seq->u1_vui_parameters_present_flag); u2_frm_wd_y = u2_pic_wd + (UWORD8)(PAD_LEN_Y_H << 1); if(1 == ps_dec->u4_share_disp_buf) { if(ps_dec->u4_app_disp_width > u2_frm_wd_y) u2_frm_wd_y = ps_dec->u4_app_disp_width; } u2_frm_ht_y = u2_pic_ht + (UWORD8)(PAD_LEN_Y_V << 2); u2_frm_wd_uv = u2_pic_wd + (UWORD8)(PAD_LEN_UV_H << 2); u2_frm_wd_uv = MAX(u2_frm_wd_uv, u2_frm_wd_y); u2_frm_ht_uv = (u2_pic_ht >> 1) + (UWORD8)(PAD_LEN_UV_V << 2); u2_frm_ht_uv = MAX(u2_frm_ht_uv, (u2_frm_ht_y >> 1)); /* Calculate display picture width, height and start u4_ofst from YUV420 */ /* pictute buffers as per cropping information parsed above */ { UWORD16 u2_rgt_ofst = 0; UWORD16 u2_lft_ofst = 0; UWORD16 u2_top_ofst = 0; UWORD16 u2_btm_ofst = 0; UWORD8 u1_frm_mbs_flag; UWORD8 u1_vert_mult_factor; WORD32 i4_cropped_ht, i4_cropped_wd; if(u1_frame_cropping_flag) { /* Calculate right and left u4_ofst for cropped picture */ u2_rgt_ofst = u1_frame_cropping_rect_right_ofst << 1; u2_lft_ofst = u1_frame_cropping_rect_left_ofst << 1; /* Know frame MBs only u4_flag */ u1_frm_mbs_flag = (1 == ps_seq->u1_frame_mbs_only_flag); /* Simplify the vertical u4_ofst calculation from field/frame */ u1_vert_mult_factor = (2 - u1_frm_mbs_flag); /* Calculate bottom and top u4_ofst for cropped picture */ u2_btm_ofst = (u1_frame_cropping_rect_bottom_ofst << u1_vert_mult_factor); u2_top_ofst = (u1_frame_cropping_rect_top_ofst << u1_vert_mult_factor); } /* Calculate u4_ofst from start of YUV 420 picture buffer to start of*/ /* cropped picture buffer */ u2_crop_offset_y = (u2_frm_wd_y * u2_top_ofst) + (u2_lft_ofst); u2_crop_offset_uv = (u2_frm_wd_uv * (u2_top_ofst >> 1)) + (u2_lft_ofst >> 1) * YUV420SP_FACTOR; /* Calculate the display picture width and height based on crop */ /* information */ i4_cropped_ht = u2_pic_ht - (u2_btm_ofst + u2_top_ofst); i4_cropped_wd = u2_pic_wd - (u2_rgt_ofst + u2_lft_ofst); if((i4_cropped_ht < MB_SIZE) || (i4_cropped_wd < MB_SIZE)) { return ERROR_INV_SPS_PPS_T; } if((3 == ps_dec->i4_header_decoded) && (ps_dec->u2_pic_wd != u2_pic_wd)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } if((3 == ps_dec->i4_header_decoded) && (ps_dec->u2_pic_ht != u2_pic_ht)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } /* Check for unsupported resolutions */ if((u2_pic_wd > H264_MAX_FRAME_WIDTH) || (u2_pic_ht > H264_MAX_FRAME_HEIGHT)) { return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED; } ps_dec->u2_disp_height = i4_cropped_ht; ps_dec->u2_disp_width = i4_cropped_wd; } /* Backup u4_num_reorder_frames if header is already decoded */ if((3 == ps_dec->i4_header_decoded) && (1 == ps_seq->u1_vui_parameters_present_flag) && (1 == ps_seq->s_vui.u1_bitstream_restriction_flag)) { u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames; } else { u4_num_reorder_frames = -1; } if(1 == ps_seq->u1_vui_parameters_present_flag) { ret = ih264d_parse_vui_parametres(&ps_seq->s_vui, ps_bitstrm); if(ret != OK) return ret; } /* Compare older u4_num_reorder_frames with the new one if header is already decoded */ if((3 == ps_dec->i4_header_decoded) && (-1 != (WORD32)u4_num_reorder_frames) && (1 == ps_seq->u1_vui_parameters_present_flag) && (1 == ps_seq->s_vui.u1_bitstream_restriction_flag) && (ps_seq->s_vui.u4_num_reorder_frames != u4_num_reorder_frames)) { ps_dec->u1_res_changed = 1; return IVD_RES_CHANGED; } ps_dec->u2_pic_wd = u2_pic_wd; ps_dec->u2_pic_ht = u2_pic_ht; /* Determining the Width and Height of Frame from that of Picture */ ps_dec->u2_frm_wd_y = u2_frm_wd_y; ps_dec->u2_frm_ht_y = u2_frm_ht_y; ps_dec->u2_frm_wd_uv = u2_frm_wd_uv; ps_dec->u2_frm_ht_uv = u2_frm_ht_uv; ps_dec->s_pad_mgr.u1_pad_len_y_v = (UWORD8)(PAD_LEN_Y_V << (1 - u1_frm)); ps_dec->s_pad_mgr.u1_pad_len_cr_v = (UWORD8)(PAD_LEN_UV_V << (1 - u1_frm)); ps_dec->u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs; ps_dec->u2_frm_ht_in_mbs = ps_seq->u2_frm_ht_in_mbs; ps_dec->u2_crop_offset_y = u2_crop_offset_y; ps_dec->u2_crop_offset_uv = u2_crop_offset_uv; /* In case bitstream read has exceeded the filled size, then return an error */ if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst) { return ERROR_INV_SPS_PPS_T; } ps_seq->u1_is_valid = TRUE; ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq; return OK; } /*! ************************************************************************** * \if Function name : ih264d_parse_end_of_sequence \endif * * \brief * Decodes End of Sequence. * * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit * * \return * 0 on Success and error code otherwise ************************************************************************** */ WORD32 ih264d_parse_end_of_sequence(dec_struct_t * ps_dec) { WORD32 ret; ret = ih264d_end_of_pic_processing(ps_dec); return ret; } /*! ************************************************************************** * \if Function name : AcessUnitDelimiterRbsp \endif * * \brief * Decodes AcessUnitDelimiterRbsp. * * \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit * * \return * 0 on Success and error code otherwise ************************************************************************** */ WORD32 ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec) { UWORD8 u1_primary_pic_type; u1_primary_pic_type = ih264d_get_bits_h264(ps_dec->ps_bitstrm, 3); switch(u1_primary_pic_type) { case I_PIC: case SI_PIC: case ISI_PIC: ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_I; break; default: ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_UNKNOWN; } return (0); } /*! ************************************************************************** * \if Function name : ih264d_parse_nal_unit \endif * * \brief * Decodes NAL unit * * \return * 0 on Success and error code otherwise ************************************************************************** */ WORD32 ih264d_parse_nal_unit(iv_obj_t *dec_hdl, ivd_video_decode_op_t *ps_dec_op, UWORD8 *pu1_buf, UWORD32 u4_length) { dec_bit_stream_t *ps_bitstrm; dec_struct_t *ps_dec = (dec_struct_t *)dec_hdl->pv_codec_handle; ivd_video_decode_ip_t *ps_dec_in = (ivd_video_decode_ip_t *)ps_dec->pv_dec_in; dec_slice_params_t * ps_cur_slice = ps_dec->ps_cur_slice; UWORD8 u1_first_byte, u1_nal_ref_idc; UWORD8 u1_nal_unit_type; WORD32 i_status = OK; ps_bitstrm = ps_dec->ps_bitstrm; if(pu1_buf) { if(u4_length) { ps_dec_op->u4_frame_decoded_flag = 0; ih264d_process_nal_unit(ps_dec->ps_bitstrm, pu1_buf, u4_length); SWITCHOFFTRACE; u1_first_byte = ih264d_get_bits_h264(ps_bitstrm, 8); if(NAL_FORBIDDEN_BIT(u1_first_byte)) { H264_DEC_DEBUG_PRINT("\nForbidden bit set in Nal Unit, Let's try\n"); } u1_nal_unit_type = NAL_UNIT_TYPE(u1_first_byte); // if any other nal unit other than slice nal is encountered in between a // frame break out of loop without consuming header if((ps_dec->u2_total_mbs_coded != 0) && (u1_nal_unit_type > IDR_SLICE_NAL)) { return ERROR_INCOMPLETE_FRAME; } ps_dec->u1_nal_unit_type = u1_nal_unit_type; u1_nal_ref_idc = (UWORD8)(NAL_REF_IDC(u1_first_byte)); //Skip all NALUs if SPS and PPS are not decoded switch(u1_nal_unit_type) { case SLICE_DATA_PARTITION_A_NAL: case SLICE_DATA_PARTITION_B_NAL: case SLICE_DATA_PARTITION_C_NAL: if(!ps_dec->i4_decode_header) ih264d_parse_slice_partition(ps_dec, ps_bitstrm); break; case IDR_SLICE_NAL: case SLICE_NAL: /* ! */ DEBUG_THREADS_PRINTF("Decoding a slice NAL\n"); if(!ps_dec->i4_decode_header) { if(ps_dec->i4_header_decoded == 3) { /* ! */ ps_dec->u4_slice_start_code_found = 1; ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); i_status = ih264d_parse_decode_slice( (UWORD8)(u1_nal_unit_type == IDR_SLICE_NAL), u1_nal_ref_idc, ps_dec); if((ps_dec->u4_first_slice_in_pic != 0)&& ((ps_dec->ps_dec_err_status->u1_err_flag & REJECT_CUR_PIC) == 0)) { /* if the first slice header was not valid set to 1 */ ps_dec->u4_first_slice_in_pic = 1; } if(i_status != OK) { return i_status; } } else { H264_DEC_DEBUG_PRINT( "\nSlice NAL Supplied but no header has been supplied\n"); } } break; case SEI_NAL: if(!ps_dec->i4_decode_header) { ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); i_status = ih264d_parse_sei_message(ps_dec, ps_bitstrm); if(i_status != OK) return i_status; ih264d_parse_sei(ps_dec, ps_bitstrm); } break; case SEQ_PARAM_NAL: /* ! */ ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); i_status = ih264d_parse_sps(ps_dec, ps_bitstrm); if(i_status == ERROR_INV_SPS_PPS_T) return i_status; if(!i_status) ps_dec->i4_header_decoded |= 0x1; break; case PIC_PARAM_NAL: /* ! */ ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm); i_status = ih264d_parse_pps(ps_dec, ps_bitstrm); if(i_status == ERROR_INV_SPS_PPS_T) return i_status; if(!i_status) ps_dec->i4_header_decoded |= 0x2; break; case ACCESS_UNIT_DELIMITER_RBSP: if(!ps_dec->i4_decode_header) { ih264d_access_unit_delimiter_rbsp(ps_dec); } break; //Let us ignore the END_OF_SEQ_RBSP NAL and decode even after this NAL case END_OF_STREAM_RBSP: if(!ps_dec->i4_decode_header) { ih264d_parse_end_of_stream(ps_dec); } break; case FILLER_DATA_NAL: if(!ps_dec->i4_decode_header) { ih264d_parse_filler_data(ps_dec, ps_bitstrm); } break; default: H264_DEC_DEBUG_PRINT("\nUnknown NAL type %d\n", u1_nal_unit_type); break; } } } return i_status; }